Dual band antenna allowing easy reduction of size and height

Inactive Publication Date: 2005-09-20
ALPS ALPINE CO LTD
View PDF15 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]The present invention has been made with a view toward solving the problem with the

Problems solved by technology

Thus, if the two different types of radiating conductor portions 4a and 4b having different meander pitches are connected in series, as in the case of t

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dual band antenna allowing easy reduction of size and height
  • Dual band antenna allowing easy reduction of size and height
  • Dual band antenna allowing easy reduction of size and height

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032]A first embodiment in accordance with the present invention will be explained with reference to the accompanying drawings. FIG. 1 is a front view of a dual band antenna according to the first embodiment of the present invention, FIG. 2 is a rear view of the dual band antenna, and FIG. 3 is an equivalent circuit diagram of the dual band antenna.

[0033]A dual band antenna 10 shown in FIGS. 1 and 2 is constituted by a first radiating conductor 13 formed by patterning copper foil or the like into a predetermined configuration on both front and back surfaces of a dielectric substrate 12 vertically provided on a grounding conductor plate 11. The first radiating conductor 13 has a first meandering portion 14 formed of a wide strip, a second meandering portion 15 that is formed of a strip slightly narrower than that of the first meandering portion 14 and continues from the upper end of the first meandering portion 14, and capacitive conductor portions 16a and 16b that are formed in reg...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A radiating conductor having first and second meandering portions and capacitive conductor portions is provided on a surface of a dielectric substrate perpendicularly provided on a grounding conductor plate. The first meandering portion and one of the capacitive conductor portions are locally opposed to each other to form a capacitive coupling portion. The first meandering portion receives high-frequency power through its bottom end. The second meandering portion is formed to have a smaller pitch than the first meandering portion, and continues to the upper end of the first meandering portion. One capacitive conductor portion formed on a front surface continues to the upper end of the second meandering portion, while the other capacitive conductor portion is formed on a back surface and connected with the former capacitive conductor portion via through holes.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a compact dual band antenna that is capable of transmitting and receiving signal waves of two different frequency bands, and is ideally built in an in-car communication device or the like.[0003]2. Description of the Related Art[0004]FIG. 6 shows a conventionally known antenna device as one of the abovementioned type of dual band antennas. In this antenna device, a radiating conductor formed by connecting two types of meander lines having different pitches is provided on a surface of a substrate (refer to, for example, pages 3 to 4 and FIG. 1 in Japanese Unexamined Patent Application Publication No. 2001-68917).[0005]In a dual band antenna 1 shown in FIG. 6, a radiating conductor 4 formed of copper foil or the like is patterned on a surface of a dielectric substrate 3 vertically provided on a grounding conductor plate 2. The radiating conductor 4 combines a first radiating conductor porti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01Q5/00H01Q1/38H01Q9/04H01Q1/32H01Q9/36H01Q5/321
CPCH01Q1/3291H01Q5/321H01Q9/36H01Q1/38
Inventor YUANZHU, DOU
Owner ALPS ALPINE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap